Adobe is releasing the font to celebrate the 25th anniversary of its Adobe Originals typefaces

Inspired by the work of 18th century French type creator Pierre Simon Fournier, Source Serif's simplified, easily readable letter shapes are designed for extended text setting on both paper and screen.

It can be used on the web or synced for use in any desktop application. You need to sign up to Typekit to download it, but it's available as part of the free plan. It will also be added to Google Fonts soon.

The font is available as part of Typekit's free plan

Grießhammer is working on additional weights and italics, and plans to add Cyrillic and Greek language support. And Adobe hopes the open source nature of the font means others will help make the typeface even more versatile.

Open source

"There's really two ways of going about this," explains Caleb Belohlavek, a principal product manager at Adobe Typekit. "One is that we've make the font available on GitHub and SourceForge. So if people want to jump in provide extensions, say Arabic, or even additional glyphs, they can submit it and we can provide additional releases in the future that support that.

Its open source nature makes it infinitely customisable

"We're taking the unofficial role of managing the original source font," he clarifies. "So if we get submissions we'll review them for quality, sometimes we'll even help and modify, and then we can re-release and provide extensions, instead of characters. But also, under the open source licence anyone can choose to take that font and modify it as they choose. They can also release it under a new name."

"So in other words, we'll protect the original one, and then if someone wants to come out with their own version or do some form of subsetting, or manipulation of the particular glyph design for their own reasons, they can do that as well."